linux-kernel - Re: [PATCH] x86/microcode_intel_early.c: Get 32-bit physical address by __pa

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Message-ID: <514B1981.2080107@zytor.com>
Date:	Thu, 21 Mar 2013 07:30:25 -0700
From:	"H. Peter Anvin" <hpa@...or.com>
To:	Ingo Molnar <mingo@...nel.org>
CC:	Fenghua Yu <fenghua.yu@...el.com>, Ingo Molnar <mingo@...e.hu>,
	Thomas Gleixner <tglx@...utronix.de>,
	penguin-kernel@...ove.SAKURA.ne.jp,
	linux-kernel <linux-kernel@...r.kernel.org>, x86 <x86@...nel.org>
Subject: Re: [PATCH] x86/microcode_intel_early.c: Get 32-bit physical address
 by __pa_nodebug()

On 03/21/2013 03:40 AM, Ingo Molnar wrote:
> 
> * Fenghua Yu <fenghua.yu@...el.com> wrote:
> 
>> +	initrd_start_p = (unsigned long *)__pa_nodebug(&initrd_start);
>> +	initrd_start_addr = (unsigned long)__pa_nodebug(*initrd_start_p);
> 
> We should probably use __pa_early() for that - aliased to __pa_nodebug(). 
> That would self-document the purpose.
> 

Well, it's not that it is early, it is that it actually can execute in
linear mode (paging off).

	-hpa


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